I have attached example of Top Level VHDL code for Cyclone III to display LCD. Kindly refer to the attached.
Check the pin guide for Cyclone III for LCD Display. You can assign each pin as your input to give output.
Refer to the link below on how to create project in Quartus. Follow the steps accordingly and set the correct device Cyclone III (EP3C120F780C7).
To learn more on Verilog HDL Basics or to create other FPGA project's. You can go through the training below and it's free.
Hope this may help you.